Choosing the best data visualization tool for machine learning depends on preferences, needs, and goals. Popular and widely used tools include Matplotlib, Seaborn, Plotly, and TensorFlow Data Visualization (TFDV). Matplotlib is a low-level Python library that provides a comprehensive set of functions and classes to create various types of plots and charts. It is highly customizable and flexible, but requires more coding and configuration. Seaborn is a high-level Python library that builds on top of Matplotlib and provides a simpler interface for creating statistical and analytical visualizations. Plotly is a cross-platform library that supports many languages and allows you to create interactive visualizations to be embedded in web pages or applications. TFDV is specifically designed for machine learning data and helps to analyze, validate, and monitor data and models. Each tool has its own advantages; Matplotlib is good for full control over visualizations, Seaborn for creating beautiful visualizations with less code, Plotly for interactive visualizations, and TFDV for integrated use with TensorFlow.